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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "FileBackupHelper_native"
#include <utils/Log.h>
#include "JNIHelp.h"
#include <android_runtime/AndroidRuntime.h>
#include <androidfw/BackupHelpers.h>
namespace android
{
// android.app.backup.BackupDataInput$EntityHeader
static jfieldID s_keyField = 0;
static jfieldID s_dataSizeField = 0;
static jlong
ctor_native(JNIEnv* env, jobject clazz, jobject fileDescriptor)
{
int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
if (fd == -1) {
return (jlong)NULL;
}
return (jlong)new BackupDataReader(fd);
}
static void
dtor_native(JNIEnv* env, jobject clazz, jlong r)
{
delete (BackupDataReader*)r;
}
static jint
readNextHeader_native(JNIEnv* env, jobject clazz, jlong r, jobject entity)
{
int err;
bool done;
BackupDataReader* reader = (BackupDataReader*)r;
int type = 0;
err = reader->ReadNextHeader(&done, &type);
if (done) {
return 1;
}
if (err != 0) {
return err < 0 ? err : -1;
}
switch (type) {
case BACKUP_HEADER_ENTITY_V1:
{
String8 key;
size_t dataSize;
err = reader->ReadEntityHeader(&key, &dataSize);
if (err != 0) {
return err < 0 ? err : -1;
}
// TODO: Set the fields in the entity object
jstring keyStr = env->NewStringUTF(key.string());
env->SetObjectField(entity, s_keyField, keyStr);
env->SetIntField(entity, s_dataSizeField, dataSize);
return 0;
}
default:
ALOGD("Unknown header type: 0x%08x\n", type);
return -1;
}
// done
return 1;
}
static jint
readEntityData_native(JNIEnv* env, jobject clazz, jlong r, jbyteArray data, jint offset, jint size)
{
int err;
BackupDataReader* reader = (BackupDataReader*)r;
if (env->GetArrayLength(data) < (size+offset)) {
// size mismatch
return -1;
}
jbyte* dataBytes = env->GetByteArrayElements(data, NULL);
if (dataBytes == NULL) {
return -2;
}
err = reader->ReadEntityData(dataBytes+offset, size);
env->ReleaseByteArrayElements(data, dataBytes, 0);
return err;
}
static jint
skipEntityData_native(JNIEnv* env, jobject clazz, jlong r)
{
int err;
BackupDataReader* reader = (BackupDataReader*)r;
err = reader->SkipEntityData();
return err;
}
static const JNINativeMethod g_methods[] = {
{ "ctor", "(Ljava/io/FileDescriptor;)J", (void*)ctor_native },
{ "dtor", "(J)V", (void*)dtor_native },
{ "readNextHeader_native", "(JLandroid/app/backup/BackupDataInput$EntityHeader;)I",
(void*)readNextHeader_native },
{ "readEntityData_native", "(J[BII)I", (void*)readEntityData_native },
{ "skipEntityData_native", "(J)I", (void*)skipEntityData_native },
};
int register_android_backup_BackupDataInput(JNIEnv* env)
{
//ALOGD("register_android_backup_BackupDataInput");
jclass clazz = env->FindClass("android/app/backup/BackupDataInput$EntityHeader");
LOG_FATAL_IF(clazz == NULL, "Unable to find class android.app.backup.BackupDataInput.EntityHeader");
s_keyField = env->GetFieldID(clazz, "key", "Ljava/lang/String;");
LOG_FATAL_IF(s_keyField == NULL,
"Unable to find key field in android.app.backup.BackupDataInput.EntityHeader");
s_dataSizeField = env->GetFieldID(clazz, "dataSize", "I");
LOG_FATAL_IF(s_dataSizeField == NULL,
"Unable to find dataSize field in android.app.backup.BackupDataInput.EntityHeader");
return AndroidRuntime::registerNativeMethods(env, "android/app/backup/BackupDataInput",
g_methods, NELEM(g_methods));
}
}
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